I have searched looking for recent thread on the use of rubber mulch products in beds. There isn't anything very new so I want to ask again. Does anyone have any experience with the new generation of rubber mulch products?? Specifically, I looking at a product by a company in the St. Louis area named International Mulch Co. The have a product named Rubberific Mulch. Their WEB site is http://www.rubberificmulch.com . This stuff sounds pretty good, but I can find no real "scientific" studies of its effects on bedding plants, shrubs, etc. They say this stuff is treated by a patended process, that colors it for 10-15 years. This attachment is a photo of one of their bed installation references.